Malicious PDF — malware analysis report

Static analysis result for SHA-256 f159535a72473662…

MALICIOUS

PDF

34.1 KB Created: 2020-09-02 18:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12339d71b93e1d1ecc8af361bc09fcaf SHA-1: 00b491d34a8217381ba2d40ec2bef39658d94aae SHA-256: f159535a72473662d73180344c4447a5a390fbf8f0c078d3b66f323259dee78e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Marvel future fight new update' and the malicious URL, suggesting a lure. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy, likely for SEO poisoning or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=marvel+future+fight+new+update
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/17840453923.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/introduction_to_categorical_data_analysis_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/63977139768.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/69619612781.pdf
    • https://cdn.shopify.com/s/files/1/0461/7994/2553/files/long_division_and_multiplication_worksheets_year_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/40222366290.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/12549483104.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/19222860336.pdf
    • https://cdn.shopify.com/s/files/1/0456/8960/2207/files/80314620463.pdf
    • https://cdn.shopify.com/s/files/1/0433/8755/1893/files/adder_tv_shows.pdf
    • https://cdn.shopify.com/s/files/1/0440/7256/6936/files/twitter_lite_for_android_4._2.pdf
    • https://cdn.shopify.com/s/files/1/0454/5937/4230/files/laxeledefamopemegoxuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/pejimanupipekozafijofab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004687.bin
d64c55df159ed5cc3df9c2b0e99f3d62f366f6c659b1cfdce8d65bb22532a8d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4687 5284 bytes
font_01_sfnt_off0000589e.bin
b8fde86e94a8ad3d31f61cc55deaaaaa8f3c892a2eb5e84b8c600512ff11fe86
pdf-font-stream PDF embedded font (sfnt) at offset 0x589E 10356 bytes